* {
  margin: 0;
  padding: 0;
}
body {
  background: rgba(0, 0, 0, 0.5);
}
.content {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -o-transform: translate(-50%, -50%);
}
.content > div {
  width: 6px;
  height: 60px;
  background: #fff;
  display: inline-block;
  animation: loading 1.5s infinite;
  -webkit-animation: loading 1.5s infinite;
  transform-origin: bottom center;
}
.content .item1 {
  animation-delay: 0.1s;
}
.content .item2 {
  animation-delay: 0.2s;
}
.content .item3 {
  animation-delay: 0.3s;
}
.content .item4 {
  animation-delay: 0.4s;
}
.content .item5 {
  animation-delay: 0.5s;
}
.content .item6 {
  animation-delay: 0.6s;
}
.content .item7 {
  animation-delay: 0.7s;
}
.content .item8 {
  animation-delay: 0.8s;
}
@keyframes loading {
  0% {
    transform: scaleY(0.1);
    -webkit-transform: scaleY(0.1);
    -moz-transform: scaleY(0.1);
    -ms-transform: scaleY(0.1);
    -o-transform: scaleY(0.1);
    background: #fff;
  }
  50% {
    transform: scaleY(1);
    -webkit-transform: scaleY(1);
    -moz-transform: scaleY(1);
    -ms-transform: scaleY(1);
    -o-transform: scaleY(1);
    background: #009966;
  }
  100% {
    transform: scaleY(0.1);
    -webkit-transform: scaleY(0.1);
    -moz-transform: scaleY(0.1);
    -ms-transform: scaleY(0.1);
    -o-transform: scaleY(0.1);
    background: transparent;
  }
}
